Research On Asphalt Pavement Health Testing Technology Based On Internal Sensor Measurement

Nowadays, the early damage of asphalt pavement is very serious, these damages severelyaffect the safety and comfort of driving vehicles, consumedly lower the using character andshortens the service life of pavement, so solving the early damage problem is important in theconstruction and management of asphalt pavement. It’s showed that, carrying on "the healthmonitoring" of asphalt pavement, accurately obtaining the mechanical information ofpavement structure, inquiring the early damage mechanism and taking the reasonable andeffective preventive measures are the keys to solve the problem.At present inland not yet form one systemic internal sensor measurement asphaltpavement health testing system and method, the paper makes study on asphalt pavementhealth test method depend on sensors in actual environment, acquire test data by sensors,propose a suit of the structure test-method of asphalt pavement based on internal sensormeasurement. The method breaks through the drawback of the tradition laboratory experiment,considers the interaction among pavement structural layers, at the same time can consider theeffect of environmental factors, such as temperature and humidity and so on.Combining with abroad pavement structural test experience, the installation andcalibration technology of sensors was researched and analyzed, the installation and calibrationmethod of sensors was proposed for pavement health testing, considering temperature,moisture, mechanical vibration, test equipment and vehicle and so on. According to healthtesting content， the number of each kind of sensor and relative position of them wasdetermined.Asphalt pavement health testing data acquisition system composition, workprocess and demand were analyzed; the LabVIEW software was used for data acquisitionsystem software design.